1. The effects of chemical reactions on the dispersion of air pollutants over area sources

   • Ram Naresh
   • R. Nath

   OriginalPaper Pages: 99 - 111

2. Gradient coupling within the terrestrial ionospheric plasma

   • S. S. De
   • S. Bandyopadhyay
   • A. C. Sen

   OriginalPaper Pages: 113 - 118

3. Asymmetries of Thomson scatter spectra from the terrestrial ionosphere

   • S. S. De
   • S. Bandyopadhyay

   OriginalPaper Pages: 119 - 126

4. Indication for precession of comet Halley's nucleus from dust tail analysis

   • Klaus Beisser

   OriginalPaper Pages: 127 - 137

5. The HELIOS spacecraft zodiacal light photometers used for comet observations and views of the comet west bow shock

   • B. V. Jackson
   • R. M. Benensohn

   OriginalPaper Pages: 139 - 163

6. Expansion of the first order planetary disturbing function by Smart's method

   • Osman M. Kamel
   • Adel S. Soliman

   OriginalPaper Pages: 165 - 170

7. Scanner observations of comet Bradfield (1987 s)

   • B. B. Sanwal
   • B. S. Rautela

   OriginalPaper Pages: 171 - 175

8. Estimation of the clear sky and the ground emissivity in Bahrain

   • W. E. Alnaser

   OriginalPaper Pages: 177 - 181

9. Phobos-II results and the Martian magnetic field

   • Ingo Orgzall
   • Siegfried Franck

   Letter to the Editor Pages: 183 - 186

10. Cometary and Solar Plasma Physics

    Book Review Pages: 187 - 188